Pressure regulator



Nov. 10 1925 J. M. SMITH PRESSURE REGULATOR IN VEN TOR.

2 Sheets-Sheet 1 Original Filed July 2, 25

ATTORNEY.

J. M. SMITH PRESSURE REGULATOR Nov. 1Q, 1925- 2 Sheets-Sheet 2 Original Filed July 2. 1923 A TTORNE Y.

" Patented Nov. 10, 1925.

UNITED STATES 1,561,365 PATENT OFFICE.

,aosnrn m. smart, or nnrnorr, MICHIGAN.

PRESSURE REGULATOB.

Application died July 2, 1923, Serial No. 649,176. Renewed September 16, 1925,

To all whom it may concemk Be it known that I, Josnrn M. SMITH, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Pressure Regulators, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to pressure regulators for fluids and is particularly'applicable to boilers and the like. The invention consists in the structural features and arran ement of parts hereinafter described and s own in the accompanying drawings, wherein:-

Fi re 1 is a view in side elevation of a her or equipped. with the improved regulator;

Figure 2 is a detail view in sectional elevation of an automatic double-acting valve of the diaphragm type of which two are,

employed in the invention;

Figure 3 is a section on line 3-3 of Figure 2;

Fi drau ic cylinder and piston which are employed in the invention;

Figure 5 is a' view in elevation ofa single-acting automatic valve employed in the invention. 1 r In these views, the reference character 1 designates a boiler which may be of any type. 2 is the steam drum i sald'boiler, 3 the smoke pipe, 4 an engine for actuating an automatic stoker (not shown) and 5 an engine for driving a blower 6 employed to force draft in the furnace of the boiler. Steam is delivered to the engines 4 and 5 by' pi es 4" and 5' branching from a :pipe 7 lea ing from the steam drum 2. .8 and 9 designate valves respectively controlling the delivery of steam to the engines 4 and 5 and 8 and 9 designate diaphragms to which pressure may be applied for exercising ailtomatic control of the Valves 8 and 9. With said diaphragms are associated the usual springs 8" and 9" acting counter to the steam pressure. Pipes 10 and 11 are adapted to apply steam pressure to the diaphragms 8 and 9'. 12 1s a pipe connected to the pipe 7 and adapted to communicate through a double-acting ,valve 13 alternatively with the ipes 10 and 11 or with a drain pi e 14:. e valve 13 is adapted for automatic control by a diaphra 15 subnected to the plunger rod 19 of a re dis a sectional elevation of a hy beyond a pre etermine jected to boiler'pressure of steam delivered prises two valve members 16 and 16 oppositely seating and respectively controlling the flow of steam from the upper valve chamber 13 to the central valve chamber 13 and from the latter to the lower valve chamber 13. 17 is an arm fast upon the pivot to a ca 1e 18 which is extended over a sheave 19 positioned above said damper, a weight 19 being suspendedfrom one end of said cable and the other end thereof being coniston 20 operated within a hydraulic cylin or '21. 22 designates a water pipe communicatin with the upper end of the cylinder 21 an adapted to be connected through a double actin valve 23 either with a water supily pipe 24 which may lead from any source upper, lower and intermediate chambers 23, 23 and 23 are formed in the valve 23 and valve members 27 and 27 control communication between said chambers, their'arrangement ,duplicatin that shown in Figure 2. Preferably, t e spring 26' is. adjusted to yield under a few pounds less in ofthe damper 3 and connected steam pressure in the pipe 11 than is requisite to overcome the springs 8" and 9".

In the operation of the described invention the spring 28 acting counter to steam pressure upon the diaphragm 15 is so adjusted that an rise of ressure in the boiler point acts through the pipe 15 uponsaid diaphragm to seat the valve member 16 and unseat the valve member 16 to an extent proportionate to the rise of pressure. This results in a simultaneous decrease of the steam admitted to the pipes 10 and 11 and an increase of the steam exhausted through the pipe 14. Consequently there is a rapid lowering of the pressure existing in the pipes 10 and 11 and acting upon the diaphragms 8' and 9' resulting in a proportionate reduction in the opening of the valves 8 and 9 and in the delivery of steam to theengines 4 and 5 so that the operation of the automatic stoker (not shown) driven by the engine 4 and of the blower 6 driven by the engine is retarded. Also the reduction of pressure in the pipe 11 permits the spring to act .upon the diaphragm 26 to increasingly uncylinder 21 forcing the piston 20 down and reduce the draft.

thereby raising the weighted end of the cable 18 and adjusting'the damper 3 to Thus, the furnace tem perature is reduced until the boiler pressure is lowered to the proper predetermined point.

In case the boiler pressure falls below the predetermined point the valve members 16 and 16 are respectively automatically opened and closed to an extent proportionate to the drop of pressure whencethere results a building up of pressure in the pipes 10 and 11 which acts upon the diaphragm 8, 9, and 26 to open the valves 8 and 9 to an extent proportionate to the drop of boiler pressure thus speeding up the engines 4 and 5 and causing the. valves 27 and 27 to respectively close and open to an extent proportionate to the pressure drop in the boiler whereby there is a discharge of water from the cylinder 21 above the piston 20 through the pipes 22 and 25, said piston being consequently raised as the weight 19 lowers and the damper 3 being adjusted to give an increased draft. v

The adjustment of the spring 26' under a somewhat lesser stress than that of the springs 8" and 9" causes the former spring 26 to yield somewhat in advance of the latter springs responsive to a rising pressure in the pipes 10 and 11, thusinsuring an opening of the damper 3 shortly prior to speeding up of thestoker and blower en glnes. Also, when pressure is falling in said pipes 10 and 11,, the springs 8" and 9" will overcome said pressure prior to the spring 26', so that retardation of said engines will precedeclosing of said damper. The time differential is desirable to eliminate the possibility of smoke and gases being blown. into the furnace room due to a lack of draft adequate for the existing pressure within the furnace. 1

Thus, the several appliances for controlling the furnace temperature, namely the damper 3, the blower 6 and the autoinatic stoker (not shown), are so controlled automatically as to respond to an increase of boiler pressure beyond a the predetermined point by a decrease of furnace temperature and to respond to a decrease of boiler pressure by an increase of furnace temperature. The fact that the described automatic mechanism is immediately responsive to pressure variations to an extent proportionate to said variations even when the latter is quite slight is effective in, maintaining the .boiler pressure substantially uniform except under conditionsof a considerable change in the variations in the load on the boiler under which conditions the described mechanism acts to return the pressure to normal with a minimum delay.

A further feature of the invention is the maintenance in the pipes 10 and 11 of a normal pressure considerably less than that of the boiler pressure so that a lesser rise or fall of such pressure is necessary to shiftthe diaphragms Sand 9 and 26.

What I claim as my invention is 1. In a boiler pressure regulator, the combination with an appliance influencing the fuinace temperature of a boiler, of a hydraulic motor. controlling said appliance, valves respectively controlling the delivery and exhaust of water from said motor, a steam pressure line subjecting one of said valves to a controlling pressure, and means for admitting or exhausting steam to and from said pressure line according as the boiler pressure varies.

2. In a boiler pressure regulator, the combination with an appliance influencing the furnace temperature, of a valve controlling the delivery of steam for energizing said appliance, fluid operable control means for said valve, a pipe supplying steam for energizing said control means, valves controlling the admission of steam to and the exhaust thereof from said pipe, means for exercising a fluid control of the last mentioned valves, and a pipe delivering steam under boiler pressure to the last mentioned means to energize the same.

In a boiler pressure regulator, the combination with an appliance influencing the furnace temperature, of a valve controlling the delivery of steam for ener izing said appliance, fluid operable means ior controlling said valve, a pipe supplying steam for energizing said means, valves controlling the admission and exhaust of steam to and from said pipe, a common means for exercising a fluid-control of ,the two last mentioned ling said valve, a pipe supplying steam for subjecting said valve to a controlling pressure, and means for automatically admitting steam to said pipe responsive to .a decrease of boiler pressure and for discharging steam from said pipe responsive to an increase of boiler pressure.

5. In a boiler pressure regulator, the combination with an appliance influencing the furnace temperature, of a pressure consion of trolled valve controlling the delivery of steam to said appliance forienergizing the same, a pipe supplying steam for exercisingpressure of the flu in container, a

valve controlling the delivering of fluid for energizing said appliance, fluid operable means for controlling said valve, a pipe supplying fluid to said fluid operable means for subjecting saidvalve to a controlling pressure and means for automatically admitting fluid to said pipe responsive to a decrease of pressure of the fluid in said container and for discharging fluid from. said pipe responsive to an increase of pressure of the fluid in said container.

7. In a fluid pressure regulator, the combination with a container for fluid under pressure, or an appliance influencing the pressure of the fluid in said container, a

valve controlling the delivering of fluid for energizing. said appliance, fluid operable control means for said valve, a pipe supplying fluid for energizing said control means, valve controlling the admisto the exhaust thereof from said pipe, means for exercising a fluid con trol of the last mentionedvalve members and a pipe delivering fluid from said container to the last mentioned means to ener gize the same.

8. In a fluid pressure regulator, the combination With a container for fluid under pressure, of a valve for controlling the passage of fluid under pressure from said container, fluid operable control means for said valve, a pipe for supplying fluid to said con trol means, valve members for respectively admitting fluid to and discharging fluid from said pipe, and fluid operable means connected to container for operatig said valve members 9. In a fluid pressure regulator, the r bination with a pipe for the passage i under pressure, of a valve for controlling the passage of fluid under pressure through said pipe, fluid operable means for controlling said valve, a second pipe for supplying fluid to said fluid operable means, a valve member for admitting fluid under -pressure to said second pipe, a valve member .r'or enhausting fluid under pressure from said second pipe, and means dependent upon the .pressure of fluid in said first mentioned pipe for operating said valve members.

10. In a fluid pressure regulator, the combination with a pipe for the passage of fluid under pressure, of a valve for controlling the passage of fluid under pressure through said pipe, fluid operable means for controlling said valve, a second pipe for supplying fluid under pressure to said fluid operable means and means connected to said first mentioned pipe for controlling the operation of said valve, said means including valve membersfor respectively admitting fluid under pressure to said second pipe responsive to a de crease or pressure of the fluid in said first mentionedpipe and discharging fluid from said second pipe responsive to an increase of pressure of the fluid in said first mentioned pipe.

11. In a fluid pressure regulator, the combination with a container for fluid under pressure, of a valve for controlling the passage of fluid. under pressure from said container, fluid operable control means for said valve, means for conducting fluid to and from said control means, means including 

